Minimize drops of trash items at higher levels

After first few levels, drops of low-value items begin to annoy. After less than a day, inventory becomes full, filled with trash items, most of which even has sell price of 0. Throwing out such items motivate user to regularly log in and check out their profile, but it's too annoying.

Make hero to pickup items depending on level, so trash items will not fill up the inventory too quickly.